Improvement in sheet-metal dies



H. MARTYN.

SHEET-METAL DIES'.

No. 174,693. V Patented March 14, 187s.

N. PETERS, FHOTO-LITHOGRAPHER. WASHINGTON. D C.

NITED STATES APlrIElv'gr OFFICE.

HENRY MARTYN, or EAs'r MEDEORD, AssieNon To HIMSELEAND f BENJAMIN E BROWN, 0E NEWTON CENTRE, MAssfrcnUsETrs.

IMPROVEMENT IN SHEET-METAL DIES.

Specification forming part of Lett'ers Patent No. 174,693, dated March 14, 187,6; application filed l 1 i' JaLuary 12,1876.

To all whom it may concern:

Be it known that I, HENRY 'MARfrYN, of East Medford, of the county of Middlesex and State of Massachusetts, have invented a new and useful Improvement in Dies for the Manufacturing of Pans, Box-Bodies, or their Govers; and do hereby declare the same to be fullyr described vin the following specification. and represented in the accompanying drawings, of Which- Figurel is a top view, Fig. 2 a side elevation, and Fig. 3 an end elevation, of a box-body of the kind as made by the dies hereinafter ex' plained. Fig. 4 is a top view, Fig. 5 a longitudinal section, and Fig. 6 a transverse section, of the female die, this latter section being taken through the projections and inclined Walls of two opposite folding cavities at one end of the die. Fig. 7 is a topview, Fig. 8 is a side elevation, and Fig. 9 an end elevation, of the male die. Fig. l0 is a top view of the body of the male die without the plunger. Fig. 1l is an under-side view of the plunger. Fig.

' 12 is a diagonal section of the male die.

The dies are for the manufacture, from a plate of metal, of a pan, box-body, or cover, having at each corner the metal folded against one side only, as'shown in Figs. l and 2, in

- which a a denote .the shorter sides, and b h the longer sides, of a box-body, While c represents the metal at each corner folded in a triangular form against one only of the sides.

With the male die of my present invention I employ a female die, made or provided at its corners with tapering cavities, anda single inclined wall to each, and one blade or projection only to each of the said cavities, all being substantially as hereinafter described, and as shown on Figs. 4, 5, and 6.

The male die, combined or for use With the aforesaid female die, has two opposite sides unrecessed, and the other two provided with inclined openings, and with recessed slides thereto, having mechanism for operating them,

(the said slides,)'all being essentially as shown in Figs. 7,8, 9,10, 1l, and 12, and hereinafter described.

The male die, instead of being in one piece or block, having at each corner single rectangular recess to receive the fold of the metal,

slide, and with a spring thereto to draw or force'theslide inward.Av Thedie also has mech'- anism for simultaneously pressing all the slides outwardly, so as to cause them to be Hush or even with the recessed sides of the die.

After the male die, in conjunction with the female die, may have performed its office of making a pan, box-body, or cover therefor,

and an attempt is made to draw such male die upward out ofthe female die, the corner slides Will be simultaneously forced inward far 'enough to force them from the corner folds of the article, in order for such article to be separated from the die.

While my present maledie contains a series of recessed slides and their operative mechanism, each of such slides operates through one side only of the body of the die, the next adjacent" side being' plain, and continued from corner to corner. of the body.

In the drawings, A denotes the said body of the male die, it being'chambered to receive a tapering plunger, B, which is fixed to a stem or shank, C, projecting upward from it. A rectangular frame, D, fastened to the upper surface of the body A projects over the plunger at its edges, in manner as represented. rlhe body has, through two opposite sides and next its corners, four oblique openings or passages, a a a a, each being to receive and guide one of a series of recessed slides, E, having in its outer end one triangular recess, b, arranged as shown, it being for reception of the triangular fold of a, plate while the said plate is being converted by the dies into a pan, box-body, or cover. Each slide E is beveled on its inner end, as shown at c; and within the slide is a chamber, f, to receive a helical spring, g, which, at its inner end, bears against that of the chamber, the outer end of the spring resting against au abutment, h, projecting up from the die into the chamber, in manner as represented.

0n pressing down the plunger all the slides E will be simultaneously advanced the requisite distance, and will be preserved in their positions by the plunger during the descent of the die into or through the female die, such slides being retracted or forced backward by is there provided vwithj a' movable recessed y inclined wall orisurfac'e,` k, the latterbeing'in one side only of the openingyH., To each cavity there is a blade or projection, l, arranged with the cavity in manner as shown. -The tapering cavity, its inclined wall, and the blade or projection l will, while a plate is being forced by the male die down through the female die, canse the metal to,4 constitutetthe s fold to be folded in a triangular shape around and against one side only of the box-body or article, and into the next contiguous recess of theslide E of the male. die.

Ido notherein claim a female die madeas shown in the United States Patent No.=163,793,'

datedmMay 251875,\and grantedto me, such `die ,being constructed tofoldV the metal in 4opposite ways, or4 on yeach -side ofa box, at each corner thereof, as my present female die is A5formedto fold the metal in one direction, or

against one sideonly, at each corner of the Iy claim as my"presentfinvention- In combination or for use with a female die,

lsubstantially as described, the male die, havingtwoiot' its body sides nnrecessed, and the other two provided with oblique openings a and recessed slides E, having mechanism for yoperatin g the v latter, all,` being essentiall y as Vset forth.

HENRY MARTYN.

Witnesses: 'I R. H; EDDY, J. R. SNOW.A 

